Cushion Lab Grown Diamond Curved Trillion Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

cushion diamond curved trillion ring in yellow gold

1 of 12

$789.00

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Independently graded by IGI IGI Report Included Selected 0.50 ct+ lab-grown center or primary diamond · IGI grading report · Signora Jewelry Certificate included. 1.2 ct lab-grown diamond · IGI report · Signora Certificate included.

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Complimentary · hand-engraved to order · adds about 3–4 days.

Estimated dispatch: 7 business days Duties & taxes prepaid

Ring size guide

Lay a ring you own flat on the circle and slide until it sits just inside it — or set its inner diameter directly.

Measure the inside of a ring that already fits — inner edge to edge — with a ruler in mm, then set it below. No ring handy? Try Measure your finger.

14 mm 24 mm 17.3 mm

Inner diameter mm

US size

UK size

EU size

Circumference

54.3 mm

Between sizes? Always choose the larger size. Fingers are slightly bigger in the evening — measure then for the best fit.

Method 1 — Use an existing ring

Find a ring that fits the intended finger comfortably.
Place it flat and measure the inner diameter (inside edge to inside edge) in mm.
Enter that measurement in the Measure a ring tab.

Method 2 — Wrap and measure

Wrap a thin strip of paper around the base of your finger.
Mark where it overlaps — measure that length in mm (your circumference).
Divide by 3.1416 (π) to get your diameter, then use the Measure a ring tab.

Tip: Middle finger sizes typically run half a size larger than the ring finger. If between sizes, go up. Measure in the evening — fingers are slightly larger then.

7US size

US	UK	EU	Diameter	Circumference

Highlighted row = your converted size. Most common women's sizes are US 6–7. All measurements in mm.

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The Signora Promise

Hand-finished in SuratMade to order

Reports where statedExact scope shown

Insured deliverySigned & tracked

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Standard-design returns30-day eligibility

Final inspectionChecked before dispatch

About This Ring

Cushion Cut · Three Stone

Center

Cushion Cut

Metal

Customizable

Setting

Three Stone

An independent IGI grading report is included when the selected individual lab-grown center or primary diamond is 0.50 ct or larger.

Detail	Details
Ring style	Three-stone engagement ring with split pavé shoulders
Center diamond	Cushion · 7.20 × 5.20 mm · Approx. 1.200 ct
Side diamonds	2 curved trillion diamonds · 3.50 × 3.50 mm · Approx. 0.240 ct total
Pavé diamonds	36 round diamonds · 0.70–1.80 mm · Approx. 0.283 ct total
Total diamond weight	Approx. 1.723 ct · 39 diamonds
Stone type	Lab Grown Diamond
Setting	Four-prong cushion basket, prong-set curved trillions and pavé split shoulders
Reference size	US 8
Finish	High Polish
Occasion	Engagement

Diamond details

Shape	Size	Qty	Weight (approx.)
Cushion center	7.20 × 5.20 mm	1	1.200 ct
Curved trillion side stones	3.50 × 3.50 mm	2	0.240 ct
Round accents	1.80 mm	4	0.100 ct
Round accents	1.40 mm	4	0.048 ct
Round accents	1.10 mm	8	0.048 ct
Round accents	1.00 mm	12	0.060 ct
Round accents	0.90 mm	6	0.024 ct
Round accents	0.70 mm	2	0.003 ct
Total	—	39	1.723 ct

At a glance

A fixed cushion Lab Grown Diamond curved-trillion engagement ring from Signora Jewels.

The ring includes a 1.200 ct, 7.20 × 5.20 mm cushion center, two curved trillion side stones and 36 round pavé accents; diamond certification included.

Thirty-nine diamonds total approx. 1.723 ct in raised prong settings above split diamond-set shoulders.

Made to order in 11 metals, with insured express shipping, prepaid duties to the US, UK and Canada, and 30-day returns.

Made to order — select your metal above. Adjust the setting height or side-stone proportions through our custom jewelry service.

Signora Jewels sets the 7.20 × 5.20 mm cushion between two curved trillions that follow its lower sides. The center sits in four prongs, while each triangular accent points inward to close the space between the diamond and the band.

The shoulders divide into two narrow rails near the head. Thirty-six rounds run through those rails in graduated sizes from 0.70 to 1.80 mm, creating a finer line of light as the split returns to one plain lower shank.

All three larger stones sit above an open gallery. A soft brush can reach beneath the baskets, and the polished palm side has no pavé edges against the finger.

Design highlights

Cushion Lab Grown Diamond center, Approx. 1.200 ct
Approx. 7.20 × 5.20 mm center dimensions
Two curved trillion side diamonds totaling Approx. 0.240 ct
Thirty-six round pavé diamonds totaling Approx. 0.283 ct
Graduated round accents from Approx. 0.70 to 1.80 mm
Four-prong center basket with individual side-stone settings
Split diamond-set shoulders returning to one plain lower band
Approx. 1.723 ct total diamond weight

The curved trillions are the working detail. Their inner points tuck beside the cushion, while their bowed outer edges lead directly into the split shoulders instead of leaving a hard break between the stones and the band.

About Lab Grown Diamonds

A cushion cut combines rounded corners with brilliant-style faceting. The curved trillions continue its outline sideways, while the smaller round diamonds produce tighter flashes along the divided shoulders.

Lab grown diamonds have the same carbon crystal structure, hardness and optical properties as mined diamonds. They are graded by the same cut, color, clarity and carat standards.

Metal, Care & Fit

Choose silver, 9K/14K/18K gold in yellow, white or rose, or platinum. 9K contains more strengthening alloy, while 18K contains more gold and carries richer color; compare the options in the metal guide.

Order in your known US size. The three-stone head and split shoulders cover more of the finger than a plain solitaire, so accurate sizing keeps the cushion upright; use the ring size and fit guide. Clean beneath each basket and between the two shoulder rails with warm water, mild soap and a soft brush.

FAQ

Is the center diamond included?
Yes. The ring includes one fixed 1.200 ct cushion Lab Grown Diamond measuring approximately 7.20 × 5.20 mm.

What is the total diamond weight?
The ring contains approximately 1.723 ct across 39 diamonds. That total includes the 1.200 ct center and approximately 0.523 ct of curved trillion and round accent diamonds.

How are the curved trillion diamonds positioned?
One curved trillion sits on each side of the cushion with its point directed inward. Their rounded outer edges lead into the divided pavé shoulders.

How is the cushion center held?
The cushion center is secured by four prongs around its rounded corners. The raised basket leaves the sides visible and gives access beneath the pavilion for cleaning.

What does the split shank do?
The upper shank separates into two narrow diamond-set rails on each side of the center. Those rails add width near the three-stone head, then return to one plain band below.

Will a wedding band sit beside this ring?
A straight wedding band sits beside the plain lower shank, though the raised side-stone baskets can leave a narrow gap near the head. A gently contoured band follows the gallery more closely.

How does a curved trillion compare with a standard trillion?
A curved trillion has a bowed outer edge that follows the center and shoulder line more closely, while a standard trillion has three straighter sides. The curved outline gives this ring a smoother transition into the split shank.

What is the difference between 9K and 18K gold?
9K gold contains more strengthening alloy and has a harder surface, while 18K contains more gold and carries richer color. Signora Jewels makes this design in both, along with 14K gold, silver and platinum.

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